<!DOCTYPE html>
<html lang="en">
<head>
  <base href=""/>
  <meta charset="UTF-8"/>
  <title>访问异常</title>
  <link type="text/css" rel="stylesheet" href="./css/bootstrap.min.css"/>
</head>
<body class="sticky-header text-center" style="margin-top:200px;">
    <h1 style="color:red;">访问异常</h1>
    <h2>您请求的页面发生异常，请重新访问或联系管理员处理！</h2>
    <button class="btn btn-lg btn-primary active" type="button" onclick="javascript:history.back();">返回</button>
</body>
</html>
